US9050702B2 - Finishing device for finish-machining of a workpiece - Google Patents

Finishing device for finish-machining of a workpiece Download PDF

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Publication number
US9050702B2
US9050702B2 US13/737,520 US201313737520A US9050702B2 US 9050702 B2 US9050702 B2 US 9050702B2 US 201313737520 A US201313737520 A US 201313737520A US 9050702 B2 US9050702 B2 US 9050702B2
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Prior art keywords
force
finishing
measuring
workpiece
transmitting arm
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US13/737,520
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US20130189910A1 (en
Inventor
Oliver Hildebrandt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Supfina Grieshaber GmbH and Co KG
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Supfina Grieshaber GmbH and Co KG
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Assigned to SUPFINA GRIESHABER GMBH & CO. KG reassignment SUPFINA GRIESHABER GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HILDEBRANDT, OLIVER
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/16—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
    • B23Q17/0952—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining
    • B23Q17/0966—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining by measuring a force on parts of the machine other than a motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/02—Machines or devices using grinding or polishing belts; Accessories therefor for grinding rotationally symmetrical surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/10—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving electrical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge

Definitions

  • the invention relates to a finishing device for finish-machining of a workpiece.
  • Finish-machining of a workpiece is a method for machining the surface of a workpiece, also referred to as “super-finishing” or “very-fine-machining process”.
  • an abrading finishing tool for example a finishing stone or a finishing belt
  • the workpiece surface to be machined hereby rotates.
  • an oscillatory motion is superimposed on the rotation of the workpiece surface to be machined, wherein the finishing tool and the workpiece surface move relative to one another in directions that are parallel or inclined to the rotation axis.
  • the complexity of the different movements of the workpiece to be machined and/or of the finishing tool can cause malfunctions even when a finishing device is carefully set up and operated, for example due to blockage of the force-generating device or due to a collision between a protrusion from the workpiece and from parts of the finishing device.
  • a finishing device for finish-machining of a workpiece includes a force-generating device for generating a driving force, a force-transmitting arm, a pressing device for applying a working force to a finishing tool, and a measuring device for measuring a deformation of a segment of the force-transmitting arm arranged in a force flux between the driving force and the working force or for measuring a deformation force applied in the segment of the force-transmitting arm, or both.
  • a substantially rigid component which transmits a driving force and converts the driving force into a working force, is used in conjunction with a measuring device for measuring a deformation and/or a force causing the deformation.
  • a measuring device for measuring at least one of the aforementioned quantities, mechanical malfunctions of the finishing device can be detected, particularly in a region located proximate to the effective location of the finishing tool and of the workpiece surface to be machined.
  • the measuring device can be used to detect a malfunction of the force-generating device.
  • a malfunction may be caused, for example, when an inadequate driving force or of a driving force having excessive variations is generated, which then results in an extremely high or a strongly varying working force.
  • Such undesirable deviation of the working force from a desired working force affects the accuracies that can be achieved during finish-machining of the workpiece surface.
  • the finishing device according to the invention therefore enables, in addition to the detection of mechanical malfunctions of the finishing device, also the detection of a deviation from a desired process quality.
  • segment of the force-transmitting arm located in the force flux between the driving force and the working force refers to material segments where deformations and/or forces causing these deformations which are caused by introduction of the driving force and the recovery of the working force can be measured. These segments may be material segments having an outer surface and/or material segments located “in the interior”, i.e. segments that do not have an outer surface.
  • the finishing device according to the invention is in principle suitable to apply any load to the force-transmitting arm.
  • Mechanical malfunctions can be measured particularly reliably when the force-transmitting arm is subjected to bending due to the introduction of the driving force and of a counterforce from the workpiece operating on the pressing device by way of the finishing tool.
  • Such bending introduces easily detectable deformations, in particular on the outer surfaces of the force-transmitting arm.
  • the finishing device according to the invention can also be used in situations where the force-transmitting arm experiences torsion caused by a friction force acting on the pressing device and generated by the workpiece when the workpiece is driven along an oscillation axis in an oscillatory fashion. Under this type of load, which may be present in addition or alternatively to the aforedescribed bending load, deformations in particular on the outer surfaces of the force-transmitting arm can also be easily measured.
  • the deformation measured by the measuring device may be an elongation and/or a compression.
  • comparatively simple sensors may be used, as will be described later.
  • the force-transmitting arm may be pivotally supported about a swivel axis.
  • the driving force and the working force may operate on segments of the force-transmitting arm that face away from one another with respect to the swivel axis.
  • a force-generating device may be provided in a finishing device having two opposing force-transmitting arms which generates driving pressure forces in opposite directions which are then converted into working forces that are aligned with each other.
  • the measuring device may be arranged between a region where the working force is effective and the swivel axis. With this arrangement, the installation space available for the force-generating device is fully conserved. In addition, deformations and/or deformation forces may be measured in a region where relatively high deformations and/or deformation forces occur.
  • the measuring device may be, for example, a surface strain gauge.
  • a surface strain gauge is commercially available, for example, from the company Kistler Instruments AG, Winterthur, Switzerland, for example with the type designation “9232A . . . ”. This type of gauge is comparatively robust and allows a simple measurement of an elongation or compression on an outer surface of the force-transmitting arm.
  • the measuring device may also include a transverse measuring dowel.
  • a transverse measuring dowel With such transverse measuring dowel, the deformation is measured in an interior region of the force-transmitting arm.
  • a quartz transverse measuring dowel of the type “9241C . . . ” from the company Kistler may be used.
  • the pressing device may be connected with a finishing tool embodied as a finishing stone.
  • the working force of the pressing device is transferred to the finishing stone which then finish-machines with an active area a workpiece surface.
  • the pressing device may advantageously have a pressing surface for pressing against a finishing tool embodied as a finishing belt.
  • the working force is applied to the finishing belt, which then transfers the working force to the workpiece surface to be machined.
  • FIG. 1 a perspective diagram of an embodiment of a finishing device for finish-machining of a workpiece according to the present invention
  • FIG. 2 a side view of a detail of the finishing device according to FIG. 1 ;
  • FIG. 3 a side view of another embodiment of a finishing device for finish-machining of a workpiece corresponding to FIG. 2 .
  • the finishing device 10 includes a stationary frame 14 with a frame part 16 for connecting a later described support device 18 to the frame 14 .
  • the support device 18 is intended for supporting a pressing device 20 on the frame 14 , as will be described in more detail below.
  • the pressing device 20 presses a finishing tool 22 (see FIG. 2 ), for example embodied as a finishing belt, against a surface of the workpiece 12 to be finish-machined.
  • the finishing device 10 includes a rotary drive device 24 (see FIG. 1 ) for rotating the workpiece 12 about a workpiece axis 26 (see FIG. 2 ).
  • the rotary drive device 24 includes a headstock 28 and a tailstock 30 .
  • the workpiece 12 is clamped between the headstock 28 and the tailstock 30 .
  • the assembly composed of the rotary drive device 24 and the workpiece 12 can be moved back and forth with a short stroke by way of an oscillatory drive 32 along an oscillation axis 34 that is parallel to the workpiece axis 26 .
  • the oscillatory drive 32 includes a carrier 36 for mounting the headstock 28 and the tailstock 30 .
  • the carrier 36 is driven by a conventional driving device, for example an eccentric drive, which will not be described in detail.
  • the workpiece 12 has a peripheral workpiece surface 38 which is eccentrically offset in relation to the workpiece axis 26 . More particularly, the peripheral workpiece surface 38 extends concentrically about an auxiliary axis 40 , which extends parallel to and is spaced from the workpiece axis 26 .
  • the workpiece 12 is a crankshaft.
  • the peripheral workpiece surface 38 is in particular the bearing face of a pin bearing of the crankshaft.
  • the support device 18 for supporting the pressing device 20 on the frame 14 has two degrees of freedom, thereby allowing the pressing device 20 to move in a plane perpendicular to the workpiece axis 26 .
  • the support device 18 includes a swivel member 44 which is held on the frame part 16 by a swivel bearing 46 for pivoting about a swivel axis 48 .
  • the swivel axis 48 extends parallel to the workpiece axis 26 .
  • the swivel member 44 is used for mounting at least one linear guide 50 , with which a bearing member 52 is supported for motion relative to the swivel member 44 along a guide axis 54 of the linear guide 50 .
  • the bearing member 52 extends substantially within a plane extending perpendicular to the workpiece axis 26 .
  • the bearing member 52 includes an opening 56 through which the swivel bearing 46 extends.
  • the bearing member 52 has a bearing member end 58 facing the workpiece 26 for arranging at least one force-transmitting arm 60 , preferably for arranging two force-transmitting arms 60 .
  • the force-transmitting arms 60 can be pivoted relative to the bearing member 52 about corresponding swivel axes 62 . More particularly, the swivel axes 62 extend parallel to the swivel axis 48 of the swivel member 44 .
  • the force-transmitting arms 60 have a first segment 64 extending between the pressing device 20 and the swivel axis 62 .
  • the force-transmitting arms 60 have additionally a second segment 66 extending between the swivel axis 62 and a force-generating device 68 .
  • the force-generating device 68 is constructed, for example, in form of a hydraulic unit 70 which applies driving forces 72 to the second segment 66 of the force-transmitting arms 60 .
  • the pressing device 20 includes at least one pressing element 73 associated with a corresponding force-transmitting arm 60 , preferably two pressing elements 73 which are each associated with a corresponding force-transmitting arm 60 and which each have a pressing surface 75 .
  • the pressing surfaces 75 are more particularly constructed in form of a shell, so that a finishing tool 22 embodied as a finishing belt can be pressed against the peripheral workpiece surface 38 along a portion of the periphery of the peripheral workpiece surface 38 .
  • the pressing device 20 and the force-generating device 68 are arranged in relation to the swivel axes 64 on opposite sides of the pressing elements 60 . Opposing driving forces 72 can thus be converted into aligned working forces 74 .
  • a measuring device 76 For measuring a deformation of at least one of the force-transmitting arms 60 , a measuring device 76 is provided which is connected with at least one force-transmitting arm 60 .
  • the measuring device 76 is, for example, a surface strain gauge 78 (see FIG. 2 ) or a transverse measuring dowel 80 (see FIG. 3 ).
  • the measuring device 76 is preferably arranged in the region of the force-transmitting arm 60 where the largest possible deformations occur due to the forces operating on the force-transmitting arm 60 . Due to the bending stress of the force-transmitting arm 60 caused by the counter forces from the workpiece 12 on the pressing device 20 and due to the driving forces 72 , the force-transmitting arm 60 is maximally compressed in a central region of the force-transmitting arm 60 (as viewed along the longitudinal extent of the force-transmitting arm), more specifically on a outside 82 of the force-transmitting arm 60 that faces away from the workpiece 12 (see FIG. 2 ).
  • a maximum elongation of the force-transmitting arm 60 also occurs in a central region of the force-transmitting arm 60 , however this time on an inside 84 of the force-transmitting arm 60 facing the workpiece 12 (see FIG. 3 ).
  • surface strain gauges 78 are preferably positioned on or adjacent to the outside 82 and/or the inside 84 of the force-transmitting arm 60 .
  • transverse measuring dowels 80 are preferably arranged inside the material of the force-transmitting arm, in particular adjacent to an outside 82 and/or an inside 84 of a force-transmitting arm 60 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
US13/737,520 2012-01-23 2013-01-09 Finishing device for finish-machining of a workpiece Active 2033-08-04 US9050702B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12152052.2A EP2617523B1 (de) 2012-01-23 2012-01-23 Finishvorrichtung zur finishenden Bearbeitung eines Werkstücks
EP12152052 2012-01-23
EP12152052.2 2012-01-23

Publications (2)

Publication Number Publication Date
US20130189910A1 US20130189910A1 (en) 2013-07-25
US9050702B2 true US9050702B2 (en) 2015-06-09

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US13/737,520 Active 2033-08-04 US9050702B2 (en) 2012-01-23 2013-01-09 Finishing device for finish-machining of a workpiece

Country Status (5)

Country Link
US (1) US9050702B2 (de)
EP (1) EP2617523B1 (de)
KR (1) KR101582372B1 (de)
CN (1) CN103213067B (de)
BR (1) BR102013001682B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2823934B1 (de) * 2013-07-09 2015-02-18 Supfina Grieshaber GmbH & Co. KG Vorrichtung zur Feinbearbeitung einer Werkstückumfangsfläche und Verfahren zum Betrieb der Vorrichtung
DE102015217600B4 (de) * 2015-09-15 2020-02-20 Supfina Grieshaber Gmbh & Co. Kg Vorrichtung zur Finishbearbeitung von Werkstücken
DE102016116161A1 (de) * 2016-08-30 2018-03-01 Supfina Grieshaber Gmbh & Co. Kg Werkzeugmaschine und Verfahren zur finishenden Bearbeitung von Werkstücken

Citations (13)

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US4873792A (en) * 1988-06-01 1989-10-17 Buehler, Ltd. Polishing apparatus
EP0459948A2 (de) 1990-05-31 1991-12-04 K.K. Holding Ag Kraft-Dehnungs-Körperschall-Aufnehmer-Kombination
DE4330808A1 (de) 1993-09-10 1995-03-16 Klaus Dr Ing Nordmann Vorrichtung zur Messung der Bearbeitungskräfte von Werkzeugen
US5447463A (en) * 1989-02-23 1995-09-05 Supfina Maschinenfabrik Hentzen Gmbh & Co. Kg Apparatus for microfinishing
DE19607778A1 (de) 1996-03-01 1997-09-04 Nagel Masch Werkzeug Vorrichtung zur Finish-Bearbeitung, insbesondere von Kurbel- oder Nockenwellen
US5683291A (en) * 1994-07-29 1997-11-04 Maschinenbau Grieshaber Gmbh & Co. Device for surface machining of workpieces
US5803796A (en) * 1996-12-18 1998-09-08 Barton, Ii; Kenneth A. Microfinishing machine
US5857895A (en) * 1994-12-27 1999-01-12 Marposs Societa' Per Azioni Checking device for a microfinishing machine tool
JPH1190822A (ja) 1997-09-22 1999-04-06 Nippei Toyama Corp ワークレスト装置
US6095909A (en) * 1997-06-06 2000-08-01 Societe Des Procedes Et Machines Speciales S.P.M.S. Abrasive belt machine tool for machining cylindrical bearing surfaces on shafts
DE19954519A1 (de) 1999-11-12 2001-05-17 Klaus Nordmann Vorrichtung zur Belastungsmessung
US20020146962A1 (en) 2001-04-09 2002-10-10 Huang Yong Li Grinding machine having a safety device
EP1518643A1 (de) 2003-09-16 2005-03-30 Supfina Grieshaber GmbH & Co. KG Finishvorrichtung

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US5142827A (en) * 1990-10-05 1992-09-01 J. D. Phillips Corporation Crankpin grinder and method
DE4235408A1 (de) * 1992-10-21 1994-04-28 Schaudt Maschinenbau Gmbh Verfahren und Vorrichtung zum Schleifen von unrunden Werkstücken
JPH0724721A (ja) * 1993-07-09 1995-01-27 Sanshin:Kk 軸状部材研磨方法及びその装置
ATE308405T1 (de) * 2001-05-28 2005-11-15 Hegenscheidt Mfd Gmbh & Co Kg Vorrichtung zum festwalzen von einstichen und radien der lagerstellen von kurbelwellen
DE602004006654T2 (de) * 2003-02-12 2008-02-07 Nissan Motor Co., Ltd., Yokohama Vorrichtung und Verfahren zur Oberflächen-Endbearbeitung
EP1447171B1 (de) * 2003-02-12 2006-07-12 Nissan Motor Co., Ltd. Vorrichtung und Verfahren zur Oberflächen-Endbearbeitung
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DE102005013637B3 (de) * 2005-03-24 2006-08-10 Hegenscheidt-Mfd Gmbh & Co. Kg Verfahren zum Festwalzen von Kurbelwellen

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4873792A (en) * 1988-06-01 1989-10-17 Buehler, Ltd. Polishing apparatus
US5447463A (en) * 1989-02-23 1995-09-05 Supfina Maschinenfabrik Hentzen Gmbh & Co. Kg Apparatus for microfinishing
EP0459948A2 (de) 1990-05-31 1991-12-04 K.K. Holding Ag Kraft-Dehnungs-Körperschall-Aufnehmer-Kombination
DE4330808A1 (de) 1993-09-10 1995-03-16 Klaus Dr Ing Nordmann Vorrichtung zur Messung der Bearbeitungskräfte von Werkzeugen
US5683291A (en) * 1994-07-29 1997-11-04 Maschinenbau Grieshaber Gmbh & Co. Device for surface machining of workpieces
US5857895A (en) * 1994-12-27 1999-01-12 Marposs Societa' Per Azioni Checking device for a microfinishing machine tool
DE19607778A1 (de) 1996-03-01 1997-09-04 Nagel Masch Werkzeug Vorrichtung zur Finish-Bearbeitung, insbesondere von Kurbel- oder Nockenwellen
US5803796A (en) * 1996-12-18 1998-09-08 Barton, Ii; Kenneth A. Microfinishing machine
US6095909A (en) * 1997-06-06 2000-08-01 Societe Des Procedes Et Machines Speciales S.P.M.S. Abrasive belt machine tool for machining cylindrical bearing surfaces on shafts
JPH1190822A (ja) 1997-09-22 1999-04-06 Nippei Toyama Corp ワークレスト装置
DE19954519A1 (de) 1999-11-12 2001-05-17 Klaus Nordmann Vorrichtung zur Belastungsmessung
US20020146962A1 (en) 2001-04-09 2002-10-10 Huang Yong Li Grinding machine having a safety device
EP1518643A1 (de) 2003-09-16 2005-03-30 Supfina Grieshaber GmbH & Co. KG Finishvorrichtung

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European Search Report dated Jul. 25, 2012, and Translation thereof.

Also Published As

Publication number Publication date
US20130189910A1 (en) 2013-07-25
KR101582372B1 (ko) 2016-01-04
BR102013001682B1 (pt) 2021-12-21
EP2617523A1 (de) 2013-07-24
CN103213067A (zh) 2013-07-24
KR20130086173A (ko) 2013-07-31
BR102013001682A2 (pt) 2015-05-12
CN103213067B (zh) 2017-03-29
EP2617523B1 (de) 2014-04-23

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